Aircraft



FIG. 1 is a top forward perspective view of a first embodiment of an aircraft showing our new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a top rear perspective view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevation view thereof;

FIG. 8 is a rear elevation view thereof;

FIG. 9 is a top forward perspective view of a second embodiment of an aircraft showing our new design;

FIG. 10 is a left side elevation view thereof;

FIG. 11 is a top forward perspective view of a fourth embodiment of an aircraft showing our new design;

FIG. 12 is a left side elevation view thereof;

FIG. 13 is a bottom plan view thereof;

FIG. 14 is a front elevation view thereof; and,

FIG. 15 is a rear elevation view thereof. 

CLAIM The ornamental design for an aircraft, as shown and described. 